A person with polio has lost the use of his leg muscles. In which area of his spinal cord would you expect the virus-infected motor neurons to be?
A) anterior gray horns
B) posterior gray horns
C) lateral gray horns
D) posterior white column
E) gray commissures
Answer: A
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An individual in Boston (sea level) will have a lower tidal volume than an individual in Denver (5,280 feet above sea level).
Answer the following statement true (T) or false (F)
Hyperventilation may lead to a decrease in the carbon dioxide levels in blood which is termed ________________
Fill in the blank(s) with correct word
Which of the following chemical equations shows what happens to part of the CO2 picked up by blood in tissues?
a) H+ + HCO3- ? H2CO3? CO2 + H2O b) CO2 + H2O ? H2CO3- ? H+ + HCO3- c) CO2 + H2CO3- ? H+ + HCO3- d) CO2 + H2O ? HCO3-
Following crossing-over in meiosis I, which of the following is NOT true?
A. A resulting gamete may have millions of possible different combinations of maternal and paternal chromosomes. B. Random orientation of maternal and parental chromatids to either pole of the cell allows mixing of these in resultant gametes. C. It is extremely unlikely that all 23 maternal and paternal chromosomes will end up in the same gamete. D. Maternal and paternal chromatids will always orient to opposite poles of the cell, remaining segregated from one another. E. Chromatid pairs lined up in the cell are separated so that half end up in each daughter cell when division occurs.